Hi Stefano...I was following this thread and I noticed the pic of your trim tag and the what caught my eye was the 1180 number that knowone seems to know what it means. My trim tag is as follows, ST 70 11427260052 BDY
TR 732 28 28 PNT
04A A 1181
Are cars were built very close. I heard something about it meaning some kind of paint sequence, In my own research I have found that predominently 1970 Nova SS cars seem to have these 4 digit codes yet yours and mine seem to be the closest I have ever seen within 1 digit, While I have never seen these codes on 1969 Nova Trim Tags. I also noticed in my research that 28 28 Fathom Blue seemed to find its way on more SS Novas than its sister Plain Jane 6 cyl or 307 variant. I have not seen too many Fathom Blue Novas that were not an SS. If you could shed light on this code I would love to find out. I have seen a lot of 70 Nova SS trim tags that start out with 0XXX but very few that start out with a 1XXX. I find this very interesting. I have added my Trim Tag info to the Nova Research project years ago but not sure if the research has had time to decipher them yet. I did my own research on 25 +/- Trim tags 85% BB Novas and a few SB SS that seemed to be legit cars.